company blog about New and Original SEMTECH GN25L98-QFN-TR — 3.1 Gb/s Burst Mode Laser Driver & Limiting Amplifier

Shenzhen Mingjiada Electronics Co., Ltd. presents the brand-new, genuine SEMTECH GN25L98-QFN-TR — a 3.1 Gb/s burst mode laser driver & limiter amplifier.

GN25L98-QFN-TR Product Description
The GN25L98-QFN-TR is a low-cost, highly integrated combined laser driver and limiter amplifier developed by Semtech, specifically designed for GPON/XGS-PON ONU/ONT (Optical Network Unit/Terminal) applications. The GN25L98-QFN-TR supports 3.1 Gbps burst mode laser drive and 3.1 Gbps limiting reception, making it suitable for applications such as fibre-to-the-home (FTTH), optical modems, and SFP/SFF optical modules.

The GN25L98-QFN-TR features a 28-pin QFN package (4×4mm) and integrates an APD (avalanche photodiode) controller, significantly reducing the number of external components and lowering system BOM costs. The chip includes automatic extinction ratio control and temperature-compensated modulation current functionality, ensuring stable laser operation under various environmental conditions.

GN25L98-QFN-TR Feature Highlights
• Dual-function integration: The GN25L98-QFN-TR integrates a burst laser driver + limiter amplifier, enabling a single chip to handle both TX/RX links.
• 3.1 Gb/s Rate: The GN25L98-QFN-TR supports downlink continuous reception and uplink burst transmission, fully meeting the symmetrical 3.1 Gb/s requirements of GPON/EPON.
• Automatic Attenuation Ratio Control (AERC): The GN25L98-QFN-TR incorporates closed-loop APC and attenuation ratio adjustment to ensure stable laser operation across the entire temperature range.
• Fast Burst Enable: The GN25L98-QFN-TR features a burst enable delay of < 2 ns and fast loop-up time, meeting the G.984 timing specifications.
• Integrated APD Boost Controller: The GN25L98-QFN-TR incorporates a high-voltage DC-DC converter to directly drive the avalanche photodiode, simplifying the receiver front end.
• On-chip temperature sensor and high-precision ADC: The GN25L98-QFN-TR supports real-time temperature compensation and digital diagnostic monitoring (DDM), enabling online monitoring of the optical module.
• Alarm functions: The GN25L98-QFN-TR provides alarm outputs such as TX_SD, Rogue ONU, and LOS, enhancing network reliability.

Specifications
Model: GN25L98-QFN-TR
Brand: Semtech
Package: QFN-28 (4×4mm)
Data Rate: 3.1 Gbps (Transmit & Receive)
Operating Temperature: -40°C to 95°C
Supply Voltage: 3.3V (Typical)
APD Controller: Integrated

Application Scenarios
The GN25L98-QFN-TR is widely used in the following fields:
• GPON/EPON FTTH ONU/ONT optical modules
• SFP/SFF plug-and-play optical transceivers
• BOSA-on-board low-cost fibre optic terminals
• Single-fibre bidirectional burst communication systems
• Compatible with GN25L53 TIA to form a complete GPON chipset

Supply Information
GN25L98-QFN-TR is available from Mingjiada Electronics with stock on hand, supporting orders starting from 1 piece, ensuring genuine products, and offering 24-hour shipping service.

GN25L98-QFN-TR, with its high integration, low power consumption, and low cost advantages, has become a popular choice in the GPON/XGS-PON optical communication market. GN25L98-QFN-TR is suitable for various high-speed fibre optic communication devices and is an ideal solution for FTTH, optical modules, industrial optical communication, and other applications.